First Results from BISTRO: A SCUBA-2 Polarimeter Survey of the Gould Belt

Derek Ward-Thompson, Kate Pattle, Pierre Bastien, Ray S. Furuya, Woojin Kwon, Shih-ping Lai, Keping Qiu, David Berry, Minho Choi, Simon Coudé, James Di Francesco, Thiem Hoang, Erica Franzmann, Per Friberg, Sarah F. Graves, Jane S. Greaves, Martin Houde, Doug Johnstone, Jason M. Kirk, Patrick M. KochJungmi Kwon, Chang Won Lee, Dongmin Li, Brenda C. Matthews, Joseph C. Mottram, Harriet Parsons, Andy Pon, Ramprasad Rao, Mark Rawlings, Hiroko Shinnaga, Sarah Sadavoy, Sven Van Loo, Yusuke Aso, Do Young Byun, Chakali Eswaraiah, Huei-ru Vivien Chen, Mike C.Y. Chen, Wen-ping Chen, Tao Chung Ching, Jungyeon Cho, Antonio Chrysostomou, Eun Jung Chung, Yasuo Doi, Emily Drabek-maunder, Stewart P.S. Eyres, Jason Fiege, Rachel K. Friesen, Gary Fuller, Tim Gledhill, Matt J. Griffin, Qilao Gu, Tetsuo Hasegawa, Jennifer Hatchell, Saeko S. Hayashi, Wayne Holland, Tsuyoshi Inoue, Shu-ichiro Inutsuka, Kazunari Iwasaki, Il Gyo Jeong, Ji Hyun Kang, Miju Kang, Sung-ju Kang, Koji S. Kawabata, Francisca Kemper, Gwanjeong Kim, Jongsoo Kim, Kee Tae Kim, Kyoung Hee Kim, Mi-ryang Kim, Shinyoung Kim, Kevin M. Lacaille, Jeong-eun Lee, Sang Sung Lee, Dalei Li, Hua Bai Li, Hong Li Liu, Junhao Liu, Sheng Yuan Liu, Tie Liu, A-ran Lyo, Steve Mairs, Masafumi Matsumura, Gerald H. Moriarty-Schieven, Fumitaka Nakamura, Hiroyuki Nakanishi, Nagayoshi Ohashi, Takashi Onaka, Nicolas Peretto, Tae Soo Pyo, Lei Qian, Brendan Retter, John Richer, Andrew Rigby, Jean Francois Robitaille, Giorgio Savini, Anna M.M. Scaife, Archana Soam, Motohide Tamura, Ya-wen Tang, Kohji Tomisaka, Hongchi Wang, Jia Wei Wang, Anthony P. Whitworth, Hsi Wei Yen, Hyunju Yoo, Jinghua Yuan, Chuan Peng Zhang, Guoyin Zhang, Jianjun Zhou, Lei Zhu, Philippe André, C. Darren Dowell, Sam Falle, Yusuke Tsukamoto

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Abstract

We present the first results from the B-fields In STar-forming Region Observations (BISTRO) survey, using the Sub-millimetre Common-User Bolometer Array 2 camera, with its associated polarimeter (POL-2), on the James Clerk Maxwell Telescope in Hawaii. We discuss the survey's aims and objectives. We describe the rationale behind the survey, and the questions that the survey will aim to answer. The most important of these is the role of magnetic fields in the star formation process on the scale of individual filaments and cores in dense regions. We describe the data acquisition and reduction processes for POL-2, demonstrating both repeatability and consistency with previous data. We present a first-look analysis of the first results from the BISTRO survey in the OMC 1 region. We see that the magnetic field lies approximately perpendicular to the famous "integral filament" in the densest regions of that filament. Furthermore, we see an "hourglass" magnetic field morphology extending beyond the densest region of the integral filament into the less-dense surrounding material, and discuss possible causes for this. We also discuss the more complex morphology seen along the Orion Bar region. We examine the morphology of the field along the lower-density northeastern filament. We find consistency with previous theoretical models that predict magnetic fields lying parallel to low-density, non-self-gravitating filaments, and perpendicular to higher-density, self-gravitating filaments.

Original languageEnglish
Article number66
JournalThe Astrophysical Journal
Volume842
Issue number1
DOIs
Publication statusPublished - 10 Jun 2017

Keywords

  • ISM: individual objects (Orion A, OMC1)
  • polarization
  • stars: formation
  • stars: magnetic field
  • submillimeter: ISM

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